Reverse opening circulating sub
作者： Richard R Angel , George S Boudreaux
DOI:
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摘要:
lens.org 参考文章(4)
Robert S Hoch, Method of removing liquid from well bore hole ,(1956)
Roy A Bobo, Aerated fluid drilling process ,(1955)
Peter W Appleby, Well washing apparatus ,(1940)
Edgar E Greve, Method and apparatus employed in the drilling of wells ,(1929)